Zootaxa 3336: 36–50 (2012) ISSN 1175-5326 (print edition) www.mapress.com/zootaxa/ Article ZOOTAXA Copyright © 2012 · Magnolia Press ISSN 1175-5334 (online edition) Description of nymphal instars and adult female of Kermes vermilio Planchon (Hemiptera, Coccoidea, Kermesidae), with a synopsis of the European and Mediterranean species GIUSEPPINA PELLIZZARI1, FRANCESCO PORCELLI2, STEFANO CONVERTINI2 & SALVATORE MAROTTA3 1University of Padova, Dipartimento di Agronomia, Animali, Alimenti, Risorse Naturali e Ambiente DAFNAE, viale dell’Università 16, 35020 Legnaro, Italy. E-mail:
[email protected]. 2Università di Bari Aldo Moro, DiBCA sez. Entomologia e Zoologia, via Amendola 165A, 70126 Bari, Italy 3Università della Basilicata, Dipartimento di Biologia, Difesa e Biotecnologie Agro-forestali, Potenza, Italy (deceased) Summary The morphology of the 1st-instar, 2nd-instar male and female, 3rd-instar female and adult female of Kermes vermilio Plan- chon (Hemiptera Coccoidea Kermesidae) are described and illustrated; micrographs of some morphological details are also provided. An identification key to instars and a table showing the present status of knowledge on the morphology of European and Mediterranean Kermes instars is included. Key words: gall-like scales, morphology, instar descriptions, identification key Introduction The genus Kermes Boitard, 1828, includes 63 species, distributed throughout the northern hemisphere and strictly linked to Fagaceae of the genus Quercus, although some Asiatic Kermes have been collected off other fagaceous genera such as Castanea, Castanopsis, Pasania, Lithocarpus and two North American species off Chrysolepis (Miller et al., 2005; Ben-Dov et al., 2012). Twenty Kermes species have been recorded so far in Europe and the Mediterranean Region, all off deciduous and evergreen oaks (Table 1).